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양이온교환수지에 의한 비스무트 지금 및 합금의 분리 정량
박면용,이병조,박기채,Myon-young Park,Byong-Cho Lee,Kee-Chae Park 대한화학회 1971 대한화학회지 Vol.15 No.2
It is shown that the impurities of Cu(II), Pb(II), Zn(II) and Ag(I) in Bismuth metal and the components of Pb(II), Zn(II) and Sn(IV) in Bismuth alloy are separated into their components from each other by elutions through $3.14cm^2{\times}10cm$ cation exchange resin, $Dowex\;50w\;{\times}\;8$ (100~200 mesh), column with the mixed solutions of HAc and NaAc as the eluents. The elution curve of Fe(III) has a long tailing and is not separated quantitatively from Bi(III). The eluents used for this separation are as follows; 1M HAc + 0.1M NaAc (pH 3.36) for Fe(III) and Bi (III). 0.3M HAc + 0.3M NaAc (pH 4.70) for Cu(II), Pb(II) and Zn(II). 0.5M HAc + 0.5M NaAc (pH4.70) for Ag(I) and Sn(IV). The analysis of cations eluted are carried out by spectrophotometry and EDTA titrimetry. Their recoveries are more than 99%.
朴冕用 建國大學校附設 應用科學硏究所 1977 理學論集 Vol.3 No.-
The studies on preparation procedures of solid supports for gas chromatographic column packing materials were carried out and obtained the best results by using diatomaceous earth produced at Kyung-Joo, Kyungbuk. Diatomaceous earth was found to be the most adequate material for solid supports among many possible substances such as firebricks and domestic natural ores-bentonite, acid clay, montmorillonite, kaolinite, etc. To obtain pink solid surpports, the natural diatomite ores were heated at 900℃for 6 hours, and then pulverized into 80-100 meshes. The particles were treated with concentrated hydrochloric acid and silane, and coated with 15% polyethylene glycol. This packing materials showed gas chromatogram tailing and asymmetrical to the polar compounds, but symmetrical without any tailing to non-poarl compounds. For the preparation of white solid supports, pulverized diatomite powders of less than 100 mesh sizes were mixed with 2% sodium carbonate, and treated with the same way as in preparing pink solid supports materials. This white solid supports treated with concentrated hydrochloric acid,10% sodium hydroxide and silane sequently, and ocated with 15% polyethylene glycol, did not show tailing to either compound but the resolution of peak were poor to non-polar compound, and gave a rather satisfactory result for the elution of polar compound compared with commercially available foreign equivalent packing materials.
이경재,박면용,조동희,정성숙,박선영 建國大學校基礎科學硏究所 1993 理學論集 Vol.18 No.-
갈바니식 산소센서용 산화음극재료의 연구에 순수한 납, 납-안티몬, 납-안티몬-주석, 납-칼슘의 합금을 사용하였다. 그중에서 납-안티몬 합금이 4M 수산화나트륨 용액중에서 가장 큰 포화전위를 5분안에 나타냈다. 4M 수산화나트륨 용액에 소량의 피로갈롤을 첨가하면 2분안에 포화전위에 도달하는 빠른 응답을 나타냈다. The pure lead, lead-antimony, lead-calcium and lead-antimony-tin aollys have been studied to use as an anodic materials of galvanic oxygen sensors. Among tested materials lead-antimony alloy was shown the highest saturated potential in 4M potassium hydroxide solution and in five minutes. Pyrogallol solution in 4M potassium hydroxide was shown rapid response to be reached the saturated potential in two minutes.